dataread.c

#include <sys/types.h>
#include <sys/socket.h>
#include <sys/un.h>

/*
 * In the included file <sys/un.h> a sockaddr_un is defined
 * as follows:
 * struct sockaddr_un {
    short sun_family;
    char sun_path[108];
 };
 */

 #include <stdio.h>

 #define NAME "socket"

 /*
  * This program creates a UNIX domain datagram socket,
  * binds a name to it, then reads from the socket.
  */

 main()
 {
    int sock, length;
    struct sockaddr_un name;
    char buf[1024];

    /* Create socket from which to read. */
    sock = socket(AF_UNIX, SOCK_DGRAM, 0);
    if (sock < 0) {
        perror("opening datagram socket");
        exit(1);
    }
    /* Create name. */
    name.sun_family = AF_UNIX;
    strcpy(name.sun_path, NAME);
    if (bind(sock, &name, sizeof(struct sockaddr_un))) {
        perror("binding name to datagram socket");
        exit(1);
    }
    printf("socket -->%s\n", NAME);
    /* Read from the socket */
    if (read(sock, buf, 1024) < 0)
        perror("receiving datagram packet");
    printf("-->%s\n", buf);
    close(sock);
    unlink(NAME);
 }